Tropisms and photosynthesis

A tropism is...

• a change in the environment

• plant movement in response to a stimulus

• something that causes a response

• when photosynthesis takes place

What is the stimulus in this example?

• Internal

• Light

• Touch

• Temperature

Tags

NGSS.MS-LS1-8

The root of a plant growing down.

• Positive geotropism

• Negative geotropism

• Thigmotropism

• Hydrotropism

Sunflowers turning towards the sun.

• Hydrotropism

• Phototropism

• Thigmotropism

• Geotropism

Tags

NGSS.MS-LS1-6

What makes a tropism positive or negative?

• Positive = movement towards stimulus, Negative = movement away from stimulus

• Negative = movement towards stimulus, Positive = movement away from stimulus

• Who cares? It doesn't matter whether it is positive or negative

• Positive = when a plant is happy, Negative = when a plant is sad

Which letter on the diagram represents the external stimulus?

• W

• X

• Y

• Z

Tags

NGSS.MS-LS1-8

The diagram shows a plant growing while lying on its side. How is the plant reacting positively and negatively to gravity?

• the root are reacting negatively by growing downward while the stem and leaves are reacting positively by growing upward

• the root are reacting positively by growing downward while the stem and leaves are reacting negatively by growing upward

• only the roots are reacting by growing downward

• only the leaves and stem are reacting by growing upward

Tags

NGSS.MS-LS1-5

What are the 3 reactants of photosynthesis? The reactants are the things needed for photosynthesis to occur.

• oxygen, glucose, sunlight

• sunlight, oxygen, water

• water, oxygen, carbon dioxide

• carbon dioxide, radiant energy, water

Tags

NGSS.MS-LS1-6

What pigment captures/absorbs sunlight?

• stomata

• chlorophyll

• chloroplast

• phloem

Tags

NGSS.MS-LS1-6

What is the tiny openings that let in the carbon dioxide needed for photosynthesis?

• stomata

• xylem

• phloem

• chloroplast

Tags

NGSS.MS-LS1-6